​Experience the thrilling and mysterious journey of Touma Hikaru as he embarks on an unforgettable adventure at Izumo Gakuen High School. Joined by his little sister-in-law Miyuki, childhood friend Nanami-chan, and rival Nagisa, Touma starts having strange dreams featuring a mesmerizing shrine maiden, immersed in a prayer to something naked in a lake. With a sense of familiarity taking root, Touma cannot help but wonder about her true identity. As his dreams unfold, Touma also catches glimpses of a peculiar room within Izumo Gakuen. Overwhelmed with curiosity, he decides to explore the room, unknowingly setting off a chain of events that will change his life forever. Prepare for an enthralling journey filled with discovery, suspense, and unexpected encounters.​